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Thoroughbred Diesel has been your online performance headquarters since 2002. We know how to get the most performance out of your pickup truck and offer all of today's most popular diesel performance products.

Overflow Cap

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When faced with hard driving conditions, a vehicle's cooling system becomes highly pressurized. Factory caps are not equipped to handle long-term use and often lose pressure, in turn reducing the potential coolant boiling point and boiling the coolant. The overflow reservoir cap will keep coolant where it needs to be, flowing into the system. Call us toll-free at 1-866-737-4966 with any questions concerning truck overflow cap.